./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test27-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test27-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2292364e3df3925555991c57490c078c89b959e0 .................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test27-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2292364e3df3925555991c57490c078c89b959e0 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:12:10,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:12:10,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:12:11,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:12:11,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:12:11,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:12:11,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:12:11,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:12:11,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:12:11,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:12:11,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:12:11,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:12:11,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:12:11,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:12:11,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:12:11,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:12:11,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:12:11,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:12:11,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:12:11,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:12:11,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:12:11,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:12:11,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:12:11,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:12:11,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:12:11,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:12:11,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:12:11,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:12:11,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:12:11,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:12:11,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:12:11,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:12:11,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:12:11,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:12:11,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:12:11,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:12:11,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:12:11,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:12:11,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:12:11,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:12:11,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:12:11,152 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:12:11,188 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:12:11,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:12:11,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:12:11,190 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:12:11,190 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:12:11,190 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:12:11,191 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:12:11,191 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:12:11,191 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:12:11,192 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:12:11,192 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:12:11,192 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:12:11,192 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:12:11,193 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:12:11,193 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:12:11,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:12:11,194 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:12:11,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:12:11,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:12:11,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:12:11,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:12:11,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:12:11,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:12:11,196 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:12:11,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:12:11,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:12:11,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:12:11,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:12:11,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:12:11,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:12:11,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:12:11,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:12:11,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:12:11,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:12:11,200 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:12:11,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:12:11,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:12:11,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:12:11,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:12:11,201 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2292364e3df3925555991c57490c078c89b959e0 [2021-10-13 08:12:11,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:12:11,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:12:11,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:12:11,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:12:11,562 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:12:11,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/ldv-regression/test27-2.c [2021-10-13 08:12:11,686 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/data/6370143fb/2252c089acb14c5da3b25bb4bc2cd031/FLAG00ecd683b [2021-10-13 08:12:12,206 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:12:12,207 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/sv-benchmarks/c/ldv-regression/test27-2.c [2021-10-13 08:12:12,214 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/data/6370143fb/2252c089acb14c5da3b25bb4bc2cd031/FLAG00ecd683b [2021-10-13 08:12:12,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/data/6370143fb/2252c089acb14c5da3b25bb4bc2cd031 [2021-10-13 08:12:12,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:12:12,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:12:12,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:12:12,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:12:12,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:12:12,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed1fa1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12, skipping insertion in model container [2021-10-13 08:12:12,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:12:12,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:12:12,851 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2021-10-13 08:12:12,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:12:12,863 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:12:12,887 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2021-10-13 08:12:12,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:12:12,905 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:12:12,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12 WrapperNode [2021-10-13 08:12:12,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:12:12,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:12:12,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:12:12,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:12:12,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:12:12,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:12:12,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:12:12,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:12:12,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:12,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:12:12,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:12:12,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:12:12,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:12:12,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (1/1) ... [2021-10-13 08:12:13,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:12:13,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:13,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:12:13,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:12:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 08:12:13,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:12:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 08:12:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:12:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 08:12:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:12:13,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:12:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 08:12:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:12:13,709 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:12:13,709 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 08:12:13,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:12:13 BoogieIcfgContainer [2021-10-13 08:12:13,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:12:13,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:12:13,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:12:13,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:12:13,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:12:12" (1/3) ... [2021-10-13 08:12:13,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb5f12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:12:13, skipping insertion in model container [2021-10-13 08:12:13,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:12" (2/3) ... [2021-10-13 08:12:13,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb5f12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:12:13, skipping insertion in model container [2021-10-13 08:12:13,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:12:13" (3/3) ... [2021-10-13 08:12:13,727 INFO L111 eAbstractionObserver]: Analyzing ICFG test27-2.c [2021-10-13 08:12:13,735 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:12:13,735 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:12:13,793 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:12:13,803 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:12:13,803 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:12:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:13,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:12:13,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:13,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:13,838 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:12:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:13,860 INFO L82 PathProgramCache]: Analyzing trace with hash 994857001, now seen corresponding path program 1 times [2021-10-13 08:12:13,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:12:13,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553675664] [2021-10-13 08:12:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:13,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:12:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:14,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:12:14,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553675664] [2021-10-13 08:12:14,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553675664] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:12:14,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:12:14,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:12:14,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144504045] [2021-10-13 08:12:14,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:12:14,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:12:14,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:12:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:12:14,289 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:14,319 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2021-10-13 08:12:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:12:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 08:12:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:14,334 INFO L225 Difference]: With dead ends: 25 [2021-10-13 08:12:14,335 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 08:12:14,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:12:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 08:12:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 08:12:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-13 08:12:14,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-10-13 08:12:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:14,377 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-13 08:12:14,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-13 08:12:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:12:14,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:14,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:14,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:12:14,379 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:12:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:14,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1531794660, now seen corresponding path program 1 times [2021-10-13 08:12:14,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:12:14,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661358760] [2021-10-13 08:12:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:14,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:12:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:14,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:12:14,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661358760] [2021-10-13 08:12:14,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661358760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:12:14,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584852916] [2021-10-13 08:12:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:14,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:14,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:14,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:14,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:12:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:14,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:12:14,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:14,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:14,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584852916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:14,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2082554451] [2021-10-13 08:12:14,829 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-13 08:12:14,831 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:12:14,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:12:14,847 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:12:14,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:12:14,939 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:14,945 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:12:14,958 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:14,959 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-10-13 08:12:14,964 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:12:14,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:14,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-10-13 08:12:14,987 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 280 [2021-10-13 08:12:15,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:15,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:15,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:15,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:15,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:15,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:15,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:15,519 INFO L354 Elim1Store]: treesize reduction 552, result has 5.3 percent of original size [2021-10-13 08:12:15,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 33 case distinctions, treesize of input 147 treesize of output 146 [2021-10-13 08:12:15,538 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:15,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-13 08:12:15,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:15,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-13 08:12:15,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:12:15,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:12:15,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:15,675 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:15,685 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 255 [2021-10-13 08:12:15,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:12:15,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:277, output treesize:255 [2021-10-13 08:12:15,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:15,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:15,907 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_16| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:12:15,910 INFO L168 Benchmark]: Toolchain (without parser) took 3328.51 ms. Allocated memory was 113.2 MB in the beginning and 148.9 MB in the end (delta: 35.7 MB). Free memory was 79.5 MB in the beginning and 106.9 MB in the end (delta: -27.4 MB). Peak memory consumption was 38.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:15,911 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 113.2 MB. Free memory is still 65.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:12:15,912 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.95 ms. Allocated memory is still 113.2 MB. Free memory was 79.1 MB in the beginning and 87.4 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:15,912 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.32 ms. Allocated memory is still 113.2 MB. Free memory was 87.4 MB in the beginning and 85.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:15,913 INFO L168 Benchmark]: Boogie Preprocessor took 33.19 ms. Allocated memory is still 113.2 MB. Free memory was 85.6 MB in the beginning and 84.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:15,914 INFO L168 Benchmark]: RCFGBuilder took 722.67 ms. Allocated memory is still 113.2 MB. Free memory was 84.0 MB in the beginning and 68.5 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:15,915 INFO L168 Benchmark]: TraceAbstraction took 2194.92 ms. Allocated memory was 113.2 MB in the beginning and 148.9 MB in the end (delta: 35.7 MB). Free memory was 68.0 MB in the beginning and 106.9 MB in the end (delta: -38.9 MB). Peak memory consumption was 29.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:15,919 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 113.2 MB. Free memory is still 65.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.95 ms. Allocated memory is still 113.2 MB. Free memory was 79.1 MB in the beginning and 87.4 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.32 ms. Allocated memory is still 113.2 MB. Free memory was 87.4 MB in the beginning and 85.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.19 ms. Allocated memory is still 113.2 MB. Free memory was 85.6 MB in the beginning and 84.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 722.67 ms. Allocated memory is still 113.2 MB. Free memory was 84.0 MB in the beginning and 68.5 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2194.92 ms. Allocated memory was 113.2 MB in the beginning and 148.9 MB in the end (delta: 35.7 MB). Free memory was 68.0 MB in the beginning and 106.9 MB in the end (delta: -38.9 MB). Peak memory consumption was 29.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_16| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_16|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:12:15,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:12:18,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:12:18,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:12:18,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:12:18,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:12:18,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:12:18,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:12:18,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:12:18,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:12:18,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:12:18,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:12:18,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:12:18,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:12:18,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:12:18,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:12:18,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:12:18,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:12:18,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:12:18,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:12:18,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:12:18,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:12:18,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:12:18,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:12:18,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:12:18,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:12:18,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:12:18,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:12:18,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:12:19,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:12:19,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:12:19,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:12:19,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:12:19,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:12:19,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:12:19,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:12:19,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:12:19,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:12:19,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:12:19,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:12:19,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:12:19,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:12:19,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:12:19,069 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:12:19,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:12:19,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:12:19,072 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:12:19,072 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:12:19,072 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:12:19,073 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:12:19,073 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:12:19,073 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:12:19,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:12:19,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:12:19,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:12:19,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:12:19,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:12:19,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:12:19,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:12:19,077 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:12:19,077 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:12:19,077 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:12:19,077 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:12:19,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:12:19,078 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:12:19,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:12:19,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:12:19,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:12:19,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:12:19,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:12:19,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:12:19,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:12:19,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:12:19,081 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:12:19,081 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:19,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:12:19,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:12:19,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:12:19,082 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2292364e3df3925555991c57490c078c89b959e0 [2021-10-13 08:12:19,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:12:19,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:12:19,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:12:19,575 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:12:19,576 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:12:19,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/ldv-regression/test27-2.c [2021-10-13 08:12:19,657 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/data/48b6c6215/d0489a88728d472c885133a88c58c854/FLAGbde26b26b [2021-10-13 08:12:20,334 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:12:20,335 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/sv-benchmarks/c/ldv-regression/test27-2.c [2021-10-13 08:12:20,343 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/data/48b6c6215/d0489a88728d472c885133a88c58c854/FLAGbde26b26b [2021-10-13 08:12:20,665 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/data/48b6c6215/d0489a88728d472c885133a88c58c854 [2021-10-13 08:12:20,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:12:20,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:12:20,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:12:20,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:12:20,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:12:20,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:12:20" (1/1) ... [2021-10-13 08:12:20,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e7ffa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:20, skipping insertion in model container [2021-10-13 08:12:20,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:12:20" (1/1) ... [2021-10-13 08:12:20,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:12:20,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:12:20,947 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2021-10-13 08:12:20,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:12:20,971 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:12:21,019 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2021-10-13 08:12:21,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:12:21,068 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:12:21,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21 WrapperNode [2021-10-13 08:12:21,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:12:21,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:12:21,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:12:21,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:12:21,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (1/1) ... [2021-10-13 08:12:21,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (1/1) ... [2021-10-13 08:12:21,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:12:21,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:12:21,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:12:21,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:12:21,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (1/1) ... [2021-10-13 08:12:21,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (1/1) ... [2021-10-13 08:12:21,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (1/1) ... [2021-10-13 08:12:21,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (1/1) ... [2021-10-13 08:12:21,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (1/1) ... [2021-10-13 08:12:21,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (1/1) ... [2021-10-13 08:12:21,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (1/1) ... [2021-10-13 08:12:21,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:12:21,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:12:21,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:12:21,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:12:21,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (1/1) ... [2021-10-13 08:12:21,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:12:21,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:21,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:12:21,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:12:21,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 08:12:21,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:12:21,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 08:12:21,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:12:21,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 08:12:21,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:12:21,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:12:21,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:12:21,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 08:12:21,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:12:21,951 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 08:12:21,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:12:21 BoogieIcfgContainer [2021-10-13 08:12:21,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:12:21,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:12:21,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:12:21,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:12:21,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:12:20" (1/3) ... [2021-10-13 08:12:21,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277c160f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:12:21, skipping insertion in model container [2021-10-13 08:12:21,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:12:21" (2/3) ... [2021-10-13 08:12:21,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277c160f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:12:21, skipping insertion in model container [2021-10-13 08:12:21,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:12:21" (3/3) ... [2021-10-13 08:12:21,964 INFO L111 eAbstractionObserver]: Analyzing ICFG test27-2.c [2021-10-13 08:12:21,971 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:12:21,971 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:12:22,036 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:12:22,050 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:12:22,050 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:12:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:22,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:12:22,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:22,095 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:22,096 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:12:22,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:22,104 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2021-10-13 08:12:22,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:22,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185779360] [2021-10-13 08:12:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:22,124 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:22,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:22,130 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:22,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:12:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:12:22,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:22,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:22,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:22,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185779360] [2021-10-13 08:12:22,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185779360] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:12:22,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:12:22,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:12:22,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960960206] [2021-10-13 08:12:22,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:12:22,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:12:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:12:22,502 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:22,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:22,538 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-10-13 08:12:22,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:12:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 08:12:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:22,550 INFO L225 Difference]: With dead ends: 30 [2021-10-13 08:12:22,550 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 08:12:22,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:12:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 08:12:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-13 08:12:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-13 08:12:22,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-10-13 08:12:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:22,592 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-13 08:12:22,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-13 08:12:22,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:12:22,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:22,594 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:22,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:22,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:22,812 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:12:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:22,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2021-10-13 08:12:22,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:22,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286120837] [2021-10-13 08:12:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:22,814 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:22,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:22,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:22,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:12:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:22,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:12:22,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:23,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:23,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:23,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286120837] [2021-10-13 08:12:23,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286120837] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:12:23,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:12:23,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:12:23,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995197143] [2021-10-13 08:12:23,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:12:23,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:12:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:12:23,107 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:23,207 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-13 08:12:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:12:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 08:12:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:23,209 INFO L225 Difference]: With dead ends: 25 [2021-10-13 08:12:23,209 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 08:12:23,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:12:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 08:12:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-13 08:12:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-13 08:12:23,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-10-13 08:12:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:23,215 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-13 08:12:23,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-13 08:12:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:12:23,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:23,216 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:23,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:23,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:23,417 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:12:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 1 times [2021-10-13 08:12:23,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:23,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534463427] [2021-10-13 08:12:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:23,419 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:23,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:23,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:23,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:12:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:23,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:12:23,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:23,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:23,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:23,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534463427] [2021-10-13 08:12:23,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534463427] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:23,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1324059430] [2021-10-13 08:12:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:23,759 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:23,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:23,766 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:23,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 08:12:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:23,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:12:23,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:24,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:24,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1324059430] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:24,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424875226] [2021-10-13 08:12:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:24,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:24,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:24,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:24,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 08:12:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:12:24,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:24,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:24,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424875226] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:24,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:12:24,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-13 08:12:24,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073486144] [2021-10-13 08:12:24,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:12:24,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:12:24,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:12:24,372 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:24,755 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-10-13 08:12:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:12:24,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 08:12:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:24,757 INFO L225 Difference]: With dead ends: 33 [2021-10-13 08:12:24,757 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 08:12:24,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:12:24,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 08:12:24,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-13 08:12:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-13 08:12:24,764 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2021-10-13 08:12:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:24,765 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-13 08:12:24,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-13 08:12:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 08:12:24,767 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:24,767 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:24,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:24,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:25,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:25,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:25,375 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:12:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:25,376 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 2 times [2021-10-13 08:12:25,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:25,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066774953] [2021-10-13 08:12:25,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:25,377 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:25,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:25,379 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:25,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:12:25,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:25,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:25,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:12:25,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:25,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:26,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:26,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066774953] [2021-10-13 08:12:26,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066774953] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:26,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [615543495] [2021-10-13 08:12:26,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:26,254 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:26,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:26,257 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:26,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 08:12:26,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:26,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:26,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:12:26,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:26,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:27,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [615543495] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:27,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262648963] [2021-10-13 08:12:27,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:27,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:27,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:27,059 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:27,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 08:12:27,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:27,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:27,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:12:27,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:27,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:27,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262648963] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:27,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:12:27,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-10-13 08:12:27,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71541098] [2021-10-13 08:12:27,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 08:12:27,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:27,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 08:12:27,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:12:27,710 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:29,100 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-10-13 08:12:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 08:12:29,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 08:12:29,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:29,102 INFO L225 Difference]: With dead ends: 41 [2021-10-13 08:12:29,103 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 08:12:29,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-10-13 08:12:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 08:12:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-13 08:12:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-13 08:12:29,113 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 23 [2021-10-13 08:12:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:29,114 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-13 08:12:29,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-13 08:12:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 08:12:29,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:29,116 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:29,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 08:12:29,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-13 08:12:29,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:29,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:29,731 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:12:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:29,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1003651516, now seen corresponding path program 3 times [2021-10-13 08:12:29,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:29,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532924718] [2021-10-13 08:12:29,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:12:29,733 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:29,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:29,740 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:29,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:12:31,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-13 08:12:31,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 08:12:31,304 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:12:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:12:32,658 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 08:12:32,658 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:12:32,659 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:12:32,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:32,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:12:32,876 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:12:32,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:12:32 BoogieIcfgContainer [2021-10-13 08:12:32,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:12:32,938 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:12:32,938 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:12:32,939 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:12:32,939 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:12:21" (3/4) ... [2021-10-13 08:12:32,942 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:12:33,070 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:12:33,070 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:12:33,072 INFO L168 Benchmark]: Toolchain (without parser) took 12401.62 ms. Allocated memory was 50.3 MB in the beginning and 83.9 MB in the end (delta: 33.6 MB). Free memory was 26.3 MB in the beginning and 32.6 MB in the end (delta: -6.4 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:33,073 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 50.3 MB. Free memory was 29.8 MB in the beginning and 29.7 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:12:33,073 INFO L168 Benchmark]: CACSL2BoogieTranslator took 398.78 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 26.0 MB in the beginning and 51.3 MB in the end (delta: -25.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:33,074 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.57 ms. Allocated memory is still 69.2 MB. Free memory was 51.1 MB in the beginning and 49.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:12:33,074 INFO L168 Benchmark]: Boogie Preprocessor took 57.57 ms. Allocated memory is still 69.2 MB. Free memory was 49.4 MB in the beginning and 48.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:33,075 INFO L168 Benchmark]: RCFGBuilder took 741.44 ms. Allocated memory is still 69.2 MB. Free memory was 47.8 MB in the beginning and 48.4 MB in the end (delta: -669.3 kB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:33,076 INFO L168 Benchmark]: TraceAbstraction took 10977.17 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 47.9 MB in the beginning and 36.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:33,076 INFO L168 Benchmark]: Witness Printer took 131.95 ms. Allocated memory is still 83.9 MB. Free memory was 36.8 MB in the beginning and 32.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:33,080 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 50.3 MB. Free memory was 29.8 MB in the beginning and 29.7 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 398.78 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 26.0 MB in the beginning and 51.3 MB in the end (delta: -25.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 82.57 ms. Allocated memory is still 69.2 MB. Free memory was 51.1 MB in the beginning and 49.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.57 ms. Allocated memory is still 69.2 MB. Free memory was 49.4 MB in the beginning and 48.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 741.44 ms. Allocated memory is still 69.2 MB. Free memory was 47.8 MB in the beginning and 48.4 MB in the end (delta: -669.3 kB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10977.17 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 47.9 MB in the beginning and 36.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. * Witness Printer took 131.95 ms. Allocated memory is still 83.9 MB. Free memory was 36.8 MB in the beginning and 32.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 55]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] struct cont cont; [L24] struct dummy dummy; [L25] struct dummy *dummies[10]; [L26] int a[10]; [L27] int i, *pa; [L28] i = __VERIFIER_nondet_int() [L29] int j = 0; [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND FALSE !(j < 10) [L36] COND TRUE i >= 0 && i < 9 [L37] a[i] = i [L38] dummy.array = &a[i] [L39] dummies[i + 1] = &dummy [L40] cont.array = &dummies[0] [L41] EXPR cont.array [L41] EXPR cont.array[i] [L41] EXPR cont.array[i]->array [L41] pa = &cont.array[i]->array[i] [L42] EXPR a[i] [L42] COND TRUE a[i] > 0 [L43] EXPR dummies[i + 1] [L43] EXPR dummies[i + 1]->array [L43] EXPR dummies[i + 1]->array[i] [L43] i = dummies[i + 1]->array[i] - 10 [L44] EXPR \read(*pa) [L44] COND FALSE !(i < *pa) [L18] EXPR pc->array [L18] EXPR pc->array[i] [L18] EXPR pc->array[i]->array [L18] EXPR pc->array[i]->array[i] [L18] return pc->array[i]->array[i] == i; [L47] COND TRUE !check(&cont, i) [L55] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10840.7ms, OverallIterations: 5, TraceHistogramMax: 10, EmptinessCheckTime: 34.5ms, AutomataDifference: 1964.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 56 SDtfs, 20 SDslu, 140 SDs, 0 SdLazy, 141 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1519.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 258 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 444.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=4, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 40.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 180.7ms SsaConstructionTime, 2700.5ms SatisfiabilityAnalysisTime, 1807.9ms InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 254 ConstructedInterpolants, 0 QuantifiedInterpolants, 570 SizeOfPredicates, 7 NumberOfNonLiveVariables, 711 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 0/240 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 08:12:33,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4f61-7c0b-41e3-942d-e2e4b36763a5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...